a(n) = 10*9^n+1.

Terms

a(0) =11a(1) =91a(2) =811a(3) =7291a(4) =65611a(5) =590491a(6) =5314411a(7) =47829691a(8) =430467211a(9) =3874204891a(10) =34867844011a(11) =313810596091